High capacity bushing plate for producing igneous rock fibers
AssigneeRock Fiber, Inc.
InventorOleksandr Biland
Life of this patent
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Abstract
An inductively heated bushing box and fiber formation method for an igneous rock melting furnace. The bushing box includes side walls with a water cooling system surrounded by one or more induction coils for maintaining and even temperature distribution of melted charge before the melt is extruded through tips of a bushing plate. The bushing plate is offset from the bottom of the one or more induction coils to avoid end effects and better ensure consistent eddy current formation. By increasing the uniformity of temperature distribution over a larger surface area, the system allows for a greater number of tips per bushing plate, and therefore provides for greater efficiency.
Claims20
A system for producing igneous rock fibers, comprising:
- a bushing box configured to receive molten igneous rock;
- one or more induction coils within the bushing box or surrounding an exterior surface of the bushing box, operable to inductively heat or maintain temperature of the molten igneous rock in the bushing box;
- and
- a tip plate defining a bottom surface of the bushing box through which the molten igneous rock is extruded;
- wherein the tip plate is configured to move upwardly or downwardly relative to the bushing box;
- and
- wherein the one or more induction coils are configured to be actuated with current.
A method for producing igneous rock fibers, comprising:
- receiving, via a bushing box, molten igneous rock from a distribution channel of a furnace;
- surrounding, via one or more induction coils, an exterior surface of the bushing box, inductively heating or maintaining temperature of the molten igneous rock in the bushing box;
- actuating the one or more induction coils with current;
- extruding the molten igneous rock through a plurality of pores in a tip plate defining a bottom surface of the bushing box;
- and
- moving the tip plate upwardly or downwardly relative to the bushing box.
A system for producing igneous rock fibers, comprising:
- a bushing box configured to receive molten igneous rock from a distribution channel of a furnace;
- one or more induction coils within the bushing box or surrounding an exterior surface of the bushing box, operable to inductively heat or maintain temperature of the molten igneous rock in the bushing box;
- and
- a tip plate defining a bottom surface of the bushing box and including a pore through which the molten igneous rock is extruded;
- wherein the tip plate is configured to move upwardly or downwardly relative to the bushing box.
Dependencies are inferred from the claim text.